The Saudi-led coalition fighting in Yemen closed off the land, sea and air ports to the Arab world’s poorest country early Monday after a rebel-fired ballistic missile targeted Riyadh, blaming the launch on Iran and warning it could be “considered as an act of war.”

Saudi officials close to the king say Sudanese President Omar al-Bashir has been invited to an upcoming summit in the Saudi capital with President Donald Trump and world leaders from across the Muslim world.

Major Saudi-led combat operations against Shiite Houthi rebels and their allies in Yemen, which began nearly a year ago, are “coming to an end,” the spokesman for the military coalition reportedly said.

A resurgent al-Qaeda in the Arabian Peninsula (AQAP) is capitalizing on the deadly civil war in Yemen, emerging as the strongest jihadist group in the country while a Saudi-led coalition concentrates on routing the Shiite Houthis and the West focuses on the Islamic State (ISIS/ISIL).

Emirati Minister of State for Foreign Affairs Anwar Gargash announced that the United Arab Emirates (UAE) is willing to deploy ground troops to Syria to combat the Islamic State (ISIS/ISIL), as part of the U.S.-led coalition.

The United Arab Emirates (UAE), a member of a U.S.-backed coalition led by Saudi Arabia, has deployed to Yemen more than 400 Colombian mercenaries who had been training in the Emirati desert to combat Iran-linked Shiite rebels known as Houthis, reports The New York Times (NYT).

Egypt and Qatar have deployed about 1,800 ground troops to Yemen this week, with other members of the 10-country coalition formed by Saudi Arabia in March to combat the Iran-linked Houthi rebels in Yemen expected to follow suit.

Iran-linked Houthis and their allies are willing to accept a United Nations Security Council resolution to end the brutal war in Yemen while Saudi Arabia appears unwilling to support a negotiated settlement in the near future, according to a leaked UN email.

The emergence of a mysterious new pro-government Arab force in the Yemeni port city of Aden is fueling speculation that ground troops from the Saudi Arabia-led coalition have been deployed to combat the Iran-backed Shiite rebels and their allies, according to some news outlets.

The aircraft carrier USS Theodore Roosevelt and escort guided missile cruiser USS Normandy were deployed to join 10 other American warships on the waters near Yemen to dissuade Iran from shipping weapons to Shiite Houthi rebels.

The U.S. is widening its role in the Saudi Arabia-led campaign against Iranian-backed Houthi rebels in Yemen, screening military targets and searching vessels for Yemen-bound game-changing weapons from Iran, reports The Wall Street Journal.